VBA IF True "AND?" IF Blank Question

Hopefully a easy one that I am over complicating How would write this to work together if checkbox one is true and crsbox2 is "" then msgbox "enter something"

If CheckBox1.Value = True Then
    If crsBox2.Text = "" Then
        MsgBox "enter something"
        End With
        Exit Sub
    End If
End If

Also can an OR be tossed in for a dual validation?

If CheckBox1.Value Or CheckBox2.Value= True Then
    If crsBox2.Text = "" Then
        MsgBox "enter something"
        End With
        Exit Sub
    End If
End If

okay I was over complicating it wouldnt matter about the checkbox so long as it checked the crsBox so this worked

    If crsBox2.Text = "" Then
        MsgBox "enter something"
        End With
        Exit Sub
    End If